Bubble extractor

In-line microfluidic bubble extractor

In-line extraction of bubbles

with or without vacuum assistance

Easily replaceable membrane

between sensitive experiments

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Features & benefits

The bubble extractor uses a micro-porous PTFE membrane. When a fluid containing gas bubbles flows through the extractor, the bubbles are expelled through the hydrophobic membrane that allows absolutely no aqueous liquid to leak. It is possible to get rid of bubbles in a fluid even with a small pressure difference across the membrane.

The liquid sample has to be pushed towards the bubble extractor inlet and not aspirated from the eliminator outlet to avoid cavitation issues (generating bubbles).

This bubble eliminator can be used in two modes: a passive mode, and an active mode where a vacuum line can be added. In this second mode, the vacuum outlet of a pressure generator, such as the OB1 Mk3, can be used to maximize the bubble trap efficiency.

This bubble extractor can be used with or without vacuum assistance, and a vacuum source such as the OB1 MK3+ can be connected to maximize the bubble extractor’s efficiency. This bubble eliminator is typically used in the range of 0.5 – 2.0 ml/min, but up to 60ml/min can be achieved when a vacuum line is used.

Robust: chemically resistant and biocompatible (body & PTFE membranes: 10µm pores),
Easy change of membranes (2 included) to avoid contaminations between runs
Different internal volume versions suited to your needs
- 44µL (S)
- 97µL (M)
- 320 µL (L)
Compatible with low rates: from 5 µL/min (indicative values)
Threaded ports: Standard 1/4″-28 Fittings suited for 1/8″, 1/16” or 1/32” OD tubing
Pressure rating: 2 bar (30psi)

Can I use the bubble extractor with organic solvent?

Not for use with organic solvents (risk of leakage).

Can I use vacuum to flow liquid through the bubble extractor?

We highly advise to push liquids towards the trap in order to avoid cavitation issues.

Should I select my bubble extractor based on the flow rate of my experiment?

The flow rate is not the principal parameter you should take into account when selecting your bubble extractor, as each variant of the device works for a large range of flow rates: researchers usually use it for flow rates up to 60 mL/min and down to 100 µL/min. However, the smaller the internal volume is, the less efficient the bubble extractor will be for higher flow rates.

How often should I change the membrane?

The membrane’s lifetime strongly depends on the kind of fluid used. As soon as you see a decrease of its efficiency, you can change the membrane of your bubble trap.

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Products and associated accessories

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Droplet Pack

Droplet generation pack

Turnkey system to easily generate droplets and control all key parameters.

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